Method of attaching an opening member to a container

Sept.

!, 1938. c. j. johansson 2,129,583

METHOD OF ATTACHING AN OPENING MEMBER TO A CONTAINER

Filed Feb. 15, 1937

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Patented Sept. 6, 1938

2,129,583

UNITED STATES PATENT OFFICE

2,129,583 METHOD OF ATTACHING AN OPENING MEMBER TO A CONTAINER

Carl J. Johansson, Savedalen, Sweden

Application February 15, 1937, Serial No. 125,903 In Sweden February 20, 1935

Claims. (CI. 29—148.2)

This invention relates to such tin boxes which are provided with parallel scored or swaging lines in one of the sides, for instance the cover, embracing a comparably narrow strip the breaking 5 away of which will remove said side of the box and make its contents accessible. More specifically this invention has reference to boxes of this class in which a rivet inserted through said side of the box between the two scored or swaging ¹⁰ lines projects perpendicularly from the side so as to admit a key to be applied to the rivet and revolved, whereby the strip is broken and wound up around the shaft of the key. Such rivets usually are fastened at the one end of said strip ¹⁵ between a head of the rivet on the innerside of the box and a tightening collar mounted upon the rivet against the outside of the box. As it is indispensable for the durable upkeep of the preserved ingredient that the attachment of said 20 rivet in the box side is air-tight such device will be rather intricate, which makes it too costly for general purposes notwithstanding its handiness and effectiveness.

The main object of this invention is to provide 25 for a simplified opening device of the class mentioned without reducing its effectivity and as a consequence to facilitate its employment on account of a decrease in the costs of manufacture.

The principal character of this invention lies 30 therein that the known loosely applied collar is substituted by an upset portion of the exteriorly projecting shaft of the rivet so that a collar is produced which is integral with the rivet and leaves the exterior end of the shaft projecting 35 like a pin for the key just as does the rivet in the known types of similar means.

In the accompanying drawing an embodiment of this invention is illustrated, whereby

Figure 1 represents an upper view of a pre40 serving tin-box provided with the improved breaking up attachment.

Figure 2 in a partially broken elevation view of the same box.

Figure 3 shows on an enlarged scale an eleva45 tion section of a portion of the box with the improved opening rivet inserted through the box side but not yet finally secured thereto.

Figure 4 shows the same opening rivet in nonfinished condition viewed from its outer end, 50 and

Figure 5 is a view similar to Figure 3 but with the attaching of the rivet completed.

In the drawing, I designates the narrow strip or tear section which is embraced by the two 55 scored or swaging lines 10 in the cover 2 of a preserving tin-box. 3 designates the pin-like end of the breaking up rivet which is secured to cover 2 at the one end of the strip I.

In Figure 3 the rivet 6 is shown on place in 00 the cover 2 but preparatory to the completing of its attachment. This figure demonstrates the method for said completing also. 4 designates diagrammatically a tool comprising two claws or punches which are applied against the shoulder presented by the thickened root portion 6 of the ⁵rivet shaft which is inserted through a hole 5 in the cover 2. In Figure 4 the thickened shaft portion 6 is exemplified to be square in crosssection so that the aforesaid shoulder is formed by the difference in configuration between the ¹⁰squared root portion 6 and the cylindrical end portion 3. However, the cross-section of the root portion 6 is arbitrary, and the only requisite is that it is larger than is the cross-section of the end portion 3 so that the aforesaid shoulder ap- ¹⁵pears thereon.

Between the head 7 of the rivet and the underside of the cover 2 there is applied a thin sheet 8 of some easy fusible soldering metal for the purpose mentioned below. Having inserted the 20 rivet into the hole 5 in the cover 2, the tool 4 is applied against the shoulder of the rivet, and blows or pressure are exerted upon said tool so as to upset the thickened root portion 6 of the rivet shaft against the Upper side of the cover 25 2 forming a collar 60 integral with the projecting pin-like end 3 of the rivet which makes the passage through the hole 5 around the rivet air tight closed simultaneously as the lower integral rivet head 7 is drawn tight against the under side 30 of the cover. When applying a soldering hammer or such like on the solder 8 this will fuse and fill up any passage through the hole 5 thus establishing a complete air tight joint around the rivet as illustrated by 80 in Figure 5. 35